Can you explain the answer of this question below:How many moles of NaCl should be dissolved in 100 mL of water to get 0.2 M solution?A:0.2B:0.02C:0.01D:0.1The answer is b.

Question

Can you explain the answer of this question below:How many moles of NaCl should be dissolved in 100 mL of water to get 0.2 M solution?&#8203;A:0.2B:0.02C:0.01D:0.1The answer is b.

Answer

Molarity =no of moles /volume( in litre) 0.2 =no of moles /0.1l No of moles =0.2×0.1 = 0.02

Answer

Yaa.. B is the correct opt... as molarity = (no.of moles of solute / vol of sol in ml)×1000here molarity = 0.2 and vol = 100mltherefore no. of moles= 0.2/10=0.02...(^_^)

Answer

Molarity(M) =no. Of moles of solute(n) ×1000/volume of solution(vs)in ml 0.2 = n×1000/100ml 1000n= 0.2×100 n =20/1000 n =0.02

Answer

To calculate the number of moles of NaCl needed to make a 0.2 M solution, we can use the formula:

Molarity = moles of solute / volume of solution in liters

First, we need to convert the volume of the solution from milliliters to liters:

100 mL = 0.1 L

Now, we can substitute the values into the formula:

0.2 M = moles of NaCl / 0.1 L

Solving for moles of NaCl:

moles of NaCl = 0.2 M x 0.1 L

moles of NaCl = 0.02

Therefore, the answer is B, 0.02 moles of NaCl should be dissolved in 100 mL of water to get a 0.2 M solution.

Answer

Hlo...friends ___________ we have, M = 0.2 v = 100ml M = no of moles / volume of solution 0.2 = no of moles × 1000 / 100 0.2 × 100 / 1000 = no of moles no of moles = 0.02 __________________

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